Final answer:
Success in becoming a good speed reader depends on practice, wider eye span, improved concentration, and comprehension at higher speeds. A speed reading course will likely focus on these elements to help Mary improve her reading fluency.
Step-by-step explanation:
To become proficient in speed reading, several key factors are vital for success. These include the development of a wider eye span to capture more words per glance, an improvement in concentration to decrease subvocalization, and regular practice that involves both speed drills to push reading speeds and comprehension exercises to retain understanding. While taking a speed reading course, Mary can anticipate that these elements, specifically practice and concentration, will significantly influence her progress.
Much like any other skill, speed reading demands consistent and purposeful training. Mary will need to invest time in practicing with varied types of reading material, from fiction to academic texts, to enhance both her reading pace and comprehension. It is not merely about how quickly one can read, but also about how well one can understand and retain information at higher speeds that defines a good speed reader.